Kaspersky Labs and Microsoft have recovered from an error that caused significant email troubles for some users of Microsoft's Antigen email security software.

Antigen users started receiving updates for their Kaspersky Labs antivirus engine again on Tuesday. Kaspersky and Microsoft had put those on hold after a flawed update caused trouble last week, representatives for the two companies said on Tuesday. Steve Orenberg, president of Kaspersky's North American operations, said: "As far as both parties are concerned, the problems have been addressed and its business as usual."